Your post looks fine on Primal but If you grab the note ID from here and use that for sharing within nostr it should be more cross compatible, links depends on how an app will display the preview and it's not always as desired
Discussion
nostr:nevent1 is correct but primal doesn't add a relay so it's not usable
Huh? Amethyst doesn't either but it seems to work, or is there a relay coded unti here?